128811198 has 8 divisors (see below), whose sum is σ = 257622408. Its totient is φ = 42937064.

The previous prime is 128811197. The next prime is 128811257. The reversal of 128811198 is 891118821.

It is a sphenic number, since it is the product of 3 distinct primes.

128811198 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128811191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10734261 + ... + 10734272.

It is an arithmetic number, because the mean of its divisors is an integer number (32202801).

Almost surely, 2^128811198 is an apocalyptic number.

128811198 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128811198 is a wasteful number, since it uses less digits than its factorization.

128811198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21468538.

The product of its digits is 9216, while the sum is 39.

The square root of 128811198 is about 11349.5021036167. The cubic root of 128811198 is about 505.0308094787.

The spelling of 128811198 in words is "one hundred twenty-eight million, eight hundred eleven thousand, one hundred ninety-eight".